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Home >> Suzuki >> 2012 >> SX4 Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Continuously Variable Transaxle (CVT)) >> Diagnostic Information and Procedures >> DTC P0721: Output Speed Sensor Circuit Range/Performance >> DTC Troubleshooting

DTC Troubleshooting

WARNING: This page is about a different variant/trim than selected.
DTC P0721 TROUBLESHOOTING CHART

Step Action YES NO
1  Was "CVT System Check" performed?  Go to Step 2. Go to CVT SYSTEM CHECK .
2  Secondary pulley speed sensor and its circuit check 
  1. Check secondary pulley speed sensor and its circuit according to Step 3 through 4 of DTC P0722 .

Are they in good condition? 		 Go to Step 3. Repair or replace defective wire harness.
3  Primary pulley speed sensor and its circuit check 
  1. Check primary pulley speed sensor and its circuit according to Step 3 through 4 of DTC P0717 .

Are they in good condition? 		 Go to Step 4. Repair or replace defective wire harness.
4  DTC check of ECM 
  1. Check DTC of ECM. See DTC CHECK

Is there any DTC(s)? 		 Go to troubleshooting for applicable DTC. Substitute a known-good TCM and recheck.
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